View Single Post
Old 29th Mar 2020, 4:26 am   #12
TIMTAPE
Octode
 
Join Date: Jul 2006
Location: Perth, Western Australia
Posts: 1,752
Default Re: Cassette torque measurement.

My first cassette torque gauge I made myself out of bits found at home. The spring came out of a Biro pen and the indicator pointer was from a paper clip.
This was for take up torque. I made another with a stronger spring (more up market Biro!) to test fast wind torques. The weakness of the simple design is that it stalls the spindle. You have to read it quickly before the End of Tape function shuts off the drive.

The other pictured is a professional Betamax torque gauge made I assume by Sony. It was sluggish when I first tested it a year or so ago so I dismantled it and found the oils in the mechanism had thickened, making the readings unreliable. A little cleaning and some light oil and it works well now.
Attached Thumbnails
Click image for larger version

Name:	Cassette torque gauge home made.jpg
Views:	201
Size:	53.6 KB
ID:	201741   Click image for larger version

Name:	Betamax cassette torque gauge.jpg
Views:	235
Size:	64.5 KB
ID:	201742  
TIMTAPE is online now